Canteen cup insulator



FIG. 1 is a perspective view of a canteen cup insulator showing the new design;

FIG. 2 is an enlarged front view thereof;

FIG. 3 is an enlarged back view thereof;

FIG. 4 is a slightly enlarged left side view thereof;

FIG. 5 is a slightly enlarged right side view thereof;

FIG. 6 is an enlarged top view thereof; and,

FIG. 7 is and enlarged bottom view thereof. 

The ornamental design for a canteen cup insulator, as shown and described. 